Your manipulator arm just failed. Maybe it’s dropping a load it shouldn’t. Maybe a joint is sticking. Maybe it just stopped responding altogether. Now you’ve got a decision to make, and you’ve got to make it fast, because every day that arm is out of action is a day your ROV can’t do the job it’s there for.
Here’s the direct answer. If the fault is minor and you have time before mobilisation, repair it. If you need equipment now and repair would take too long, rent one. If the arm keeps failing every few months, stop repairing it reactively and put it on a service schedule instead. Most operators end up doing all three at different points, and knowing which one applies right now saves you money and saves you downtime.
Let’s go through each option properly.
Repair makes sense when the fault is isolated, parts are available, and you’re not racing an impossible deadline. A worn actuator, a damaged gripper, a control fault. These are the bread and butter of ROV manipulator repair in the UK, and a good repair shop can usually turn them around fast if they’re carrying the right spares.
This is also where the brand of your arm matters. Schilling manipulator repair works differently to repairing a Kraft or an ISE arm, because the internals, the hydraulics, and the control logic are all different. If your repair partner doesn’t have real experience on Schilling systems specifically, you’re taking a gamble on turnaround time and on whether the fix actually holds once it’s back underwater.
What you should expect from a proper repair job:
- A clear diagnosis before any work starts, not just a guess
- Parts availability confirmed up front, so you’re not waiting weeks halfway through
- Testing and calibration after the repair, not just a visual check
- Full documentation of what was found, what was replaced, and what was tested
If a repair company can’t give you that, keep looking. Anyone can swap a part. Not everyone can prove it’s actually fixed.
When rental is the smarter move
Sometimes repair just isn’t fast enough. You’ve got a mobilisation date, the arm is down, and waiting three weeks for parts isn’t an option. This is exactly what ROV manipulator rental exists for.
Renting isn’t a compromise. A well-maintained rental arm, fully serviced and certified before it leaves the yard, will perform just as well as your own equipment. The difference is you’re not carrying the capital cost, the storage, or the maintenance burden between jobs.
This applies beyond manipulators too. Subsea torque tool rental, ROV tooling hire, general subsea equipment rental. If you’re weighing up whether to buy or whether to rent, the calculation usually comes down to how often you actually need the equipment. Own it if it’s in constant use. Rent it if the need is occasional, seasonal, or urgent.
If you’re based in or working out of the northeast, ROV tooling in Aberdeen is worth sourcing locally rather than shipping from further afield. Aberdeen has the depth of subsea tooling suppliers to get equipment to you fast, which matters when your schedule is already tight.
When you need a service plan, not another repair
Here’s the pattern worth paying attention to. If the same manipulator keeps coming back with faults, repairing it again isn’t solving the actual problem. You’re treating symptoms.
A structured ROV service plan catches wear before it becomes a failure. Inspections on a schedule, not just when something breaks. Preventative maintenance that extends the life of the arm instead of patching it up after the fact. Over a year, this almost always costs less than a string of emergency repairs, and it keeps your equipment out of the fault log and in the water where it belongs.
Good subsea tooling services in the UK will offer this as standard, not as an upsell. If your current provider only ever reacts to breakdowns and never proposes a maintenance schedule, that’s worth questioning.
How AJL Subsea can help
We repair and service ROV manipulators, including Schilling systems, with full diagnostics, testing and calibration on every job, and documentation you can actually use for your records. We also rent out ROV tooling, manipulators and subsea equipment from our base in Aberdeen, so if you need something now rather than in three weeks, we can usually get it to you fast. And if your equipment keeps failing on the same fault, we’ll tell you straight whether a service plan makes more sense than another repair invoice.
FAQs
It depends on the fault and whether parts are in stock. Simple faults with parts on hand can be turned around quickly. Anything needing specialist parts takes longer, which is exactly why it’s worth asking about spares availability before you commit to a repair timeline.
Yes. The hydraulics, control systems and internal components differ between manufacturers, so a technician experienced specifically on Schilling arms will diagnose and fix faults faster and more reliably than someone working outside their usual brand.
If the fault is minor and the arm will be back in regular use, repair is usually cheaper long term. If you need equipment immediately and repair would cause a costly delay, rental is the better short term move. Most operators use both depending on the situation.
Inspection, preventative maintenance, testing, and calibration, done on a schedule rather than only after something breaks. It should come with documentation so you can track the equipment’s history over time.
AJL Subsea supplies ROV tooling, manipulator rental and general subsea equipment out of Aberdeen, with fast mobilisation for UK based projects.
Most operators rent ROV tooling, torque tools, hydraulic systems and manipulators when the need is occasional rather than constant. If equipment is only needed for a specific project or campaign, renting avoids the cost of ownership, storage and maintenance between jobs.